Pkocess of hajsrufacttrking plubal-layee strttctttees



Patented Dec. 12, 1922.

APPLICATION FILED FEB. 20, 1920.

2 SHEETSSHEET 1.

Jrzn

A. ELMENDORF.

PROCESS OF MANUFACTURING PLURAL LAYER STRUCTURES. APPLICATION FILED FEB. 20. 1920.

1,438,429. Patented Dec.12,1922.

2 SHEETSSHEET 2.

Patented Dec. 12, 1922.

-LEMI 1\T (ELM-ENDORF, OF MADISON, WISCONSIN.

PROCESS OF MTANU'FACTUEING PLURAL-LAYER STRUCTURES.

Application filed February 20, 1.920. Serial No. 360,220.

To all a komef'mag concern:

Be it known that .l, llRMIN Emrnnnonr, a citizen of the United Eitates of America, residing at Madison, in the county of Dame and State of Wisconsin, have invented certain'new and useful Improvements in Processes of Manufacturing Plural-Layer Structures, of which the following is a. specification. I

My invention relates to the manufacture of plural layer structures by joining layers of fabric, paper, rubber, leather or similar materials to thin plies of veneer. My process is also applicable to the joining oi? layers of any two or more of these materials. Cardboard, libreboard, or other similar materials may have plies of veneer or layers of the other materials mentioned applied thereto by my process. I

In carrying out my invention I use albumin glue or other glues. requiring heat for setting. 1 The glue may be applied wet by brush or roller or in dry form by using glue-impregnated sheets. The setting of the glue is accomplished by heated rollers in connection with concave plates ot such size that heat and pressure may be applied the required length of'time' to produce a superior grade of plural layer structures. The necessary heat may also beappliedby heating the air in the chamber-where the pressure is applied.

The rapid, efiicient, and economical production oi very thinplural'layer structures is accomplished by my process. I obviate the necessity ofusinga large number'of clamps and also save the time incident to clamping and unclamping the material. I also save the time usually allowed for setting the glue when heat and pressure are applied in the usual way with plate presses.

y my process a very thin structure may be produced suitable for covering the walls and ceilings of rooms, covering containers, and for general use in decorating.

A further object of my invention is the production of plural layer structures by setting the glue used bya high temperature. By using the apparatus I have invented the setting of the glue is continuously carried on while the apparatus is in operative condition. I can applythe necessary pressure continuously for the necessary time to accomplish the results desired.

Among the important features of my invention, therefore, are: first; a process of ,erly moistened continuously producing plural layer structures, that is, without stopping the apparatus by which-it is produced after it is started until it is desired to stop production; sec ond; apparatus for applying the necessarv h gh degree oi temperature to set the glue third; apparatus designed to continue the application of heat the necessary length of time to complete the set of the glue; and, fourth; apparatus for applying the necessary pressure.

These and further objects are accomplished and my process is carried out by the apparatus which is illustrated in the accompanying drawings, in which:

Figure 1 is a vertical sectional view illustinting apparatus for carrying out my process; 1

Figure 2 is a similar view showing a modilied form of apparatus for carryingout my process;

Figure 3 is a vertical section of the pressing roll and steam plate, showing an endless belt applied to the steam plate;

Figure i is a vertical section showing a modified form of apparatus for carrying out my process; and

Figure 5 is a similar view showing another modified form of apparatus for carrying'out my process.

Thin veneer l wound on a drum 2 is as over a support 3 and a supporting roller 4; until it comes in contact with 5 pressing roll 5 which may be heated by steam or in any other suitable way. as by a "flame,hotliuid or electr ity. Fapor. liabric r rubber, or other material 6 which it is desired to join to veneer is fed from a drum 1 over a sizing drum 8. This drum is propwith glue 9, such as albumin glue or other glue requiring heat higher than ordinary room temperature to it. Revolving in the glue receptacle 110 is a roller llsliaitable for spreading the glue on the sizing drum 8. Placed against the pressing roll 5 and in proper relation thereto is a hollow steam plate 5 'vhich may be heated by steam or in any other suitable way, as by a flame, fluid, or electricity The steam plate covers approximately half the pressing roll. To obtain a uniform pressure, the pressing roll may be covered with a padding 13 of any suitable material. If, however, the plies to be united are sufiiciently soft and yielding, no padding of the pressing roll is necessary. Proper prestiplicity 0'? sm.

sure is obtained by the use of adjustable springs 1%.

Glue, such as albumin glue or other glues which require a high tempera 3173 to set, is used in my process with the apparatus disclosed, and a temperature not under it Fahrenheit is mzrintained from the time the plies are brought together until the finished product comes out from between the pressing rol and the steam plate and is wound on a drum l5 placed a suitable distance from the pressing roll and plate to allow the finished product to dry and complete the setting.

A temperature as high as 350 Fahrenheit obtained by high pressure steam may be used in carrying'outiny process. Generally speaking, the speed with which the plies are passed through the apparatus is in creased as the temperature is increased above 160 Fahrenheit.

Motion is imparted to all. off the moving by any oi? the usual means, such as by a motor. I

Veneer in its green condition may be just as it comes "from the veneer cutting machine.

it. multiplicity oi? duplicate pressing rolls and steam plate may be used to carry out my process. y

it slightly different "application of my process 'is disclosed in Figure 2, in which veneer is wound on the drum 16; paper, fibre, rubber, leather or similar materialv on the drum 17; and gluedmpregnated sheet on the drum 18. These three plies are carried directly to the heated pressing roll and steam plate where th 7 are caused to adhere in the same manner with the device illustrated in l i 'ure l. The finished product i then wound on a suitable drum 19. "Either or all or the layers may be dried or moistened as desired, or veneer in the green cone: on may be used.

In l igure 3, an endless belt 20 0t fabric or other suitable material extending the ent re length of the steam plate and pressroll i caused to move by the pressing roll or by rollers 21'between the pressing roll and the steam plate. This belt prevents the glazing or glossing of the veneer which sometimes results from sliding over th metal steam plate shown in Fig ures 1 and 2.

In Figure l, a pressing roll 2.2, heated in the same way the pressing roll shown in'lligures 1, 2, and 3, has arranged around the greater part of its circumference a 1nul ll rollers Extending around these rollers 23 is an endless belt which moves in the direction indicated,

Layers or? material 25, such as have been indicated for use with the apparatus illustrated in Figure 1 and 9/, with glue applied to one or more layers or with glue in the 1,4es,4.ae

tor n oia dry layer, are fed between the Lore-sein roll and the small rollers Where a t) w I the use and 'nessure are a) )lied I 1 II I J 1 l the re I 1 a n O'Ltlffle to set the glue.

The finished product 26 may be Wound on way i. An apparatus of the hind described means to bring layers of maher including revolving drums terial toget from which said layers are fed, means to cause said layers to adhere including a revolvin pressing roll having the surface tl erect padded, a concave plate surrounding substantially half of said pressing roll, a

belt passingaround said concave plate and. between said plate and said roll, means to heat the layers .in excess of 160 Fahrenheit while passi between said roll and said plate and a drumion which the finished product is wound.

53. An apparatus for manufacturing plural layer structures comprising means to bring together a layer or wood veneer anda layer oi other material with a layer of albumin adhesive impregnated material between said layers, including rc. living drums from which said layers are uuwouud, means tov cause said layers to adhere including a steam heated pressing roll having the surface thereof padded, a concave heated steam plate, a moving belt extend? 5 around said plate and in direct contact with said roll, whereby the veneer layer is prevented'from comingin contact with said plate and being glazed thereby, means to heat said roll and said plate to a sui'licien temperature to set said adhesive, and means to regulate the pressure between said roll and said plate.

3. An apparatus o1 the kind described comprising means to bring layers or? material together includingrevolving drums from which said layers are fed "cans to cause said layers to adhere incluur revolving pressing roll and a concave plate surrounding a part of said pressing roll between which and are passed, said roll having a layer of moisture absorbing material thereon, means to said layers, n'ieans to apply prcssureto said layers, and a drum on which the finished product "is wound.

t. An apparatus of the kind described comprising means to bring layers of material together including revolving drums from which said layers are fed, means to cause said layers to adhere including a revolving pressing roll and a concave plate surrounding a part of said pressing roll between Whic said layers are passed, said roll and said plate having a layer oi moisture absorbing material thereon, means to heat said layers, means to apply pressure to said layers, and a drum on which the finished product is Wound.

5. A process of manufacturing plural layer structures comprising bringing together plies to be united and an adhesive, and subjecting said plies and said adhesive to both heat and pressure at the same time, the application of heat and pressure being continuous from the time first applied until the conclusion 01"- the application, and said plies and said adhesive being heated and pressed While in a curved position.

A continuous process of manufacturing plural layer structures comprising bringing together plies to be united and anadhesive, subjecting said plies and said adhesive to both heat and pressure at the same time, the application oi heat and pressure being' continuous "from the time first applied until the conclusion of the application thereof, said plies and said adhesive being heated and pressed While in a curved position said plies and said adhesive beng in. constant motion While both heat and pressure are'applied. Y. A continuous process of manufacturir plural layer structures comprising bringin together plies to be united and an adhesive. sub'eeting. said plies and said adhesive to both heat and pressure at the same time, the application of heat and pressure being continuous from the time first applied until the conclusion the application thereof, said plies and said adhesive being heated and pressed While in a curved position, said plies and said adhesive being in constant motion While both heat and pressure ied, and providing for the evaporation of moisture from. the plies While heat and pressure are applied.

in testimony whereof I affix my signature ARMIN ELMENDORF.

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